His company Four Sigmatic claims that their ‘medicinal mushrooms’ (no, not that kind) can help boost brain power and increase productivity – without the distracting side effects that excessive regular coffee consumption can cause.

The coffee’s made by boiling and liquefying dried matsutake mushrooms into an extract – which is then added to mild Arabica beans from Central America.

So really, we’re really talking about a half-mushroom, half-coffee mix.

The mushrooms have to be cooked in order to reap the health benefits, and it’s this process that makes the ground coffee extra nutritious.